3201120991 has 2 divisors, whose sum is σ = 3201120992. Its totient is φ = 3201120990.

The previous prime is 3201120983. The next prime is 3201121013. The reversal of 3201120991 is 1990211023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3201120991 - 2³ = 3201120983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3201120191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600560495 + 1600560496.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560496).

Almost surely, 2^3201120991 is an apocalyptic number.

3201120991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3201120991 is an equidigital number, since it uses as much as digits as its factorization.

3201120991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 3201120991 is about 56578.4498815583. The cubic root of 3201120991 is about 1473.7846529568.

The spelling of 3201120991 in words is "three billion, two hundred one million, one hundred twenty thousand, nine hundred ninety-one".